Updated : September 3, 2025Have you ever tried calling a Dutch number? Wondered if you are doing it right? You are not alone. With mobile commerce expected to reach $3.5 trillion this year, smooth communication across borders has become a business necessity.
This is where understanding the Netherlands phone number format makes all the difference. In this guide, we will walk you through the basics.
We explain number structures, dialing rules, common mistakes, and even how to set up a Dutch virtual number with CallHippo.
Understanding Netherlands Phone Number Format
Understanding the structure of Dutch mobile phone numbers can help you avoid dialing mistakes and missed phone calls. Let’s simplify this further so you can make connections without any confusion.
1. Overview of the Netherlands’ Number
There are 10 digits in a standard Netherlands phone number.
It includes a trunk code (0), an area code or mobile code, and the subscriber number. When making international calls, you should use the Netherlands country code +31 in place of the trunk code.
This structure is fundamental to how the Dutch telephone network operates. It enables the clear distinction between mobile, landline, and special numbers nationwide.
2. The Importance of Netherlands Numbers for Businesses
For businesses, Dutch numbers open doors to one of Europe’s strongest economies. Having a local number builds trust, improves customer response rates, and reduces call costs.
It also helps companies look more accessible and reliable. For businesses operating in the Netherlands especially, focusing on customer service and sales outreach is crucial. Plus, executing marketing campaigns in this region requires thorough planning.
3. Validating Netherlands Numbers with Regular Expressions
Validation ensures the numbers you collect or dial are correct. Using regular expressions (regex), businesses can confirm Dutch numbers follow the right format.
This avoids failed calls, wasted leads, and compliance issues. Regex acts as a filter, catching errors in length, codes, or sequence before the number is used.
- ^(?:\+31|0)[1-9]\d{8}$
- This will quickly check if the format of the Dutch number is correct or not.
Things to Know Before Dialing a Netherlands Phone Number
Now, before you call, there are some important details about Dutch phone numbers that you should know:
1. Dialing Code
You need to first enter the international dialing code of the country when you are calling Netherlands from abroad. Then enter +31 phone number. It is the country code of the Netherlands. At last, eliminate the first zero of the local phone number.
- When you call Amsterdam from the U.S., the number would look like 011 + 31 + 20 + phone number.
2. Mobile vs. Landline
Dutch mobile numbers always begin with 06 when dialed locally. When calling them from abroad, they begin with +316. Local numbers use area codes like 020 for Amsterdam. For Rotterdam, the area code is 010.
Knowing the difference prevents confusion. It ensures you are hitting the correct type of line, whether it is a landline or a cell phone.
3. Netherlands Area Code
Area codes in the Netherlands vary between two and three digits. Major cities have shorter codes (Amsterdam’s is 20), while smaller regions use longer ones.
The area code always comes before the subscriber number. This helps you to route calls to the correct location within the country.
4. Trunk Code
Within the Netherlands, local calls begin with a trunk prefix of 0. Then comes the area code or mobile code. However, when you dial from abroad, this 0 is dropped and replaced with the +31 country code.
Forgetting to remove the trunk code is a common mistake that blocks calls.
Store Dutch phone numbers in your contacts using the international format (+31) rather than the local format. This ensures the number is functional both in the Netherlands and when you are overseas.
Netherlands Phone Number Regulations & Compliance
Now let me tell you about the rules behind Dutch phone numbers. If you are planning to use Dutch numbers for business, know these basics.
1. Regulatory Authority and Relevant Legislation
In the Netherlands, it is the Authority for Consumers and Markets (ACM) that keeps telecom in check. They make sure providers play fair and follow the Dutch Telecommunications Act. They also ensure adherence to EU standards on privacy, competition, and network access.
For you, this simply means numbers are allocated transparently, and service providers must meet strict quality rules.
2. Registration Requirements for Telecom Providers
When a company wants to provide telecom services in the Netherlands, it cannot simply decide to do so. Providers must register with the Dutch Telecom Agency. They should comply with the technical specifications. They also need to follow EU rules on consumer rights and data protection.
This implies that you can access reliable services and portability to select new service providers at will.
3. Restrictions on Special & Premium-Rate Numbers
Not all numbers are created equal. Toll-free numbers (0800) are free for callers. Premium-rate ones (0900, 0906, 0909) are chargeable. Dutch law requires providers to clearly state costs before the call connects. Some premium services, like adult content or misleading ads, are banned altogether.
The goal here is simple: protect consumers from hidden fees and scams.
4. Telemarketing Regulations & Caller ID Requirements
Telemarketing is tightly regulated in the Netherlands. Businesses can’t just cold-call anyone. They need prior consent. And when they do call, the number must be visible and genuine. Hiding caller IDs or using fake numbers is not allowed.
These rules give consumers more control and help businesses build trust instead of frustration.
- Always show a valid caller ID and make sure to clearly explain call costs if you are using Dutch phone numbers. It helps to establish trust with your callers and guarantees adherence to Dutch law.
Different Types of Dutch Phone Numbers
All Dutch telephone numbers are not the same. The entire telephone system is designed so that each number is programmed to perform a certain task. Following is a list of the principal categories that you will find:
1. Geographic Numbers
These are numbers that are related to Dutch regions. Having a geographical number forms a strong local identity for companies. Also, it is simple to acquire credibility with clients within a region or city.
- 020 is Amsterdam and 010 is Rotterdam
2. Mobile Numbers
Mobile numbers in the Netherlands start with 06 when dialed locally or +316 internationally. They are not designated with any region. This makes them very convenient for both personal and business use. They are usually preferred by companies when it comes to customer service numbers because of their accessibility and universality.
3. Toll-Free Numbers
Toll-free numbers start with 0800. Callers don’t pay for the call. The business covers the cost. For customers, this feels like an open invitation to reach out without hesitation. And for businesses, it is a smart way to encourage more inquiries and improve accessibility.
4. Premium Rate Numbers
Numbers starting with 0900, 0906, or 0909 fall into this category. These come with extra charges that the caller pays. They are often utilized for services like technical support or entertainment hotlines. Dutch legislation requires advance announcement of the price so the customer is clear about what they are being charged.
5. Special Numbers
These special numbers are reserved for public service and emergencies. Perhaps the most famous is 112, Europe’s emergency number. Others put you in touch with government services or with health hotlines. They are easy numbers to recall and are designed to give immediate access to the necessities of life.
Common Mistakes to Avoid When Dialing Dutch Numbers
Now let’s talk about the common mistakes you can face when dialing Dutch numbers. These errors may seem small, but they can easily stop your calls from going through.
1. Incorrect Formatting or Missing Codes
One of the easiest mistakes to make is leaving out part of the number. Maybe you forgot the country code, or maybe the area code is missing. Because without the right structure, your call simply won’t connect.
Always double-check the full format before you dial, especially when you make international calls.
2. Using the Leading Zero with International Calls
Here is a common trap: when you call from outside the Netherlands, you don’t need the leading 0 before the local number.
- Amsterdam’s 020 becomes +31 20.
If you keep the zero, your call won’t go through. So drop it whenever you are dialing internationally.
3. Connection or Service-Related Issues
Sometimes the mistake is not in how you dial. It is the service itself. If you’re using VoIP or mobile networks, poor internet or weak coverage can block the call.
If your format looks right but the call fails, try again on a stronger connection or check with your provider.
- Did you add +31 for the Netherlands?
- Did you remove the leading 0 for international calls?
- Is the area code included?
- Are you on a good internet or mobile network?
- Double-checked the number format before hitting call?
How to Get a Netherlands Phone Number Using CallHippo?
With CallHippo, set up your Netherlands phone number in just a few minutes. No complicated paperwork or hardware is needed. Just follow these steps:
- Sign up or log in to CallHippo: Create your account or log in if you already have one.
- Pick the Netherlands as your country: Select from the list of available countries.
- Choose your number type: Go for local, mobile, or toll-free, depending on your needs.
- Select your plan: Pick a pricing plan that fits your team’s usage.
- Complete the setup: Once activated, you can start making and receiving calls instantly.
Ready to Call Netherlands?
Enhance efficiency and customer satisfaction with CallHippo's advanced tools.
What is the Best Time to Call the Netherlands?
If you want your calls to land well, timing matters. The Netherlands follows Central European Time (CET). This can be quite different from your local time. Here is a quick guide to help you pick the right calling hours.
1. Calling from the USA
The Netherlands is usually 6–9 hours ahead of U.S. time zones. The sweet spot for calls is early morning in the U.S. (around 7–10 AM EST), which falls in the Dutch afternoon.
2. Calling from the UK
Good news, it’s simple. The Netherlands is only 1 hour ahead of the UK. You can comfortably call during your normal business hours.
3. Calling from Australia
This one is a little tricky. Australia is 8–10 hours ahead of the Netherlands. That means you’ll need to aim for your evening, which lines up with the Dutch morning.
4. Calling from India
India is 4.5 hours ahead of the Netherlands. A good window is late afternoon or evening in India, which matches up with Dutch working hours.
5. Time Zone Differences and Call Time Suggestions
- Netherlands: 9 AM – 6 PM CET is the standard working window.
- Always check time differences before dialing.
- Try to call during overlap hours where both sides are likely to be working.
Conclusion
Staying in touch with the Netherlands is simpler than you might think. You are good to go, once you know the country code, the procedure of dialing the mobile numbers and the best time to call.
At the end of the day, it is not merely about making a call. It is about making effortless calls that help you communicate more.
And if you want an even easier way to do that, CallHippo gives you a Netherlands virtual number so you can talk, collaborate, and grow without any extra hassle.
FAQs
1. What is the standard Netherlands phone number format?
- Dutch numbers always start with the country code +31 when dialed from outside the country.
- Inside the Netherlands, numbers begin with 0.
- In total, there are nine digits after the code/0.
- The first figures show whether it is a mobile or landline number.
2. How do Dutch landline and mobile numbers differ in format?
Landline numbers usually begin with 1-7 after the country code and can vary based on city or region. Mobile numbers always start with 6.
3. How should I write or dial a Dutch phone number from abroad?
When calling the Netherlands from a foreign location, start with +31 and then add the number. Make sure you drop the leading 0 that’s used within the country.
For example, 0612345678 in the Netherlands becomes +31 612345678 abroad.
4. Are there special prefixes or codes I should watch for?
Yes. The most important one is the country code +31 for international calls. Within the Netherlands, local numbers start with a 0, but it should always be removed when calling from abroad. Keeping this in mind helps avoid wrong connections.
5. What are the most common mistakes people make with Dutch phone numbers?
One mistake is dialing the 0 after entering +31, and the call doesn’t go through. Some people also forget the country code when making international calls. Always double check the format before you call.
Published : September 3, 2025
Anant Berge is a B2B SaaS content writer who creates engaging, user-focused, and SEO-driven content for tech businesses. With a knack for simplifying complex ideas and a passion for storytelling, Anant crafts narratives that help brands connect with their audience through blogs and website content.
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